Growing up Michael Jordan was in his prime Beijing native Wu You knew what he wanted to d

问题补充：

Growing up Michael Jordan was in his prime，Beijing native Wu You knew what he wanted to do.

A. since

B. when

C. until

D. before

答案：

A. since

(答案→)B. when

C. until

D. before

解析：考查时间状语从句。语意：因为成长在迈克尔·乔丹盛年时期，北京人吴悠知道自己想要做什么。when在此表示“……的时候”，故选B。